Table 7.9.

Details to include in describing very coarse and coarse soils

Size fractionDetails to includeExample as principalExample as secondary
BOULDERSDimensions, shape, strength, lithology200–400 mm rounded BOULDERS of strong basaltBoulders are 200–400 mm rounded of strong basalt
COBBLESShape, strength, lithologySub-angular COBBLES of medium strong limestoneCobbles are sub-angular of medium strong limestone
GRAVELShape, grading, lithologySubrounded fine to coarse sandstone GRAVELGravel is subrounded fine to coarse of sandstone
SANDGrading, lithology when not quartzFine occasionally coarse shelly SANDNo detail required